Astro Superior Low Hydrogen Welding Electrode 616A

Astro 616A is a controlled hydrogen, high tensile strength, ferritic electrode. This high quality, all position, low amperage electrode features rapid deposition. Deposits have good ductility, are dense, crack free and of x-ray quality. Excellent for steels sensitive to cracking when welded with conventional mild steel electrodes. Superior impact resistance at normal and sub-zero temperatures.

Applications:

• For welding carbon and low alloy steels
• Enamelling steels and cold rolled steels or steels high in sulphur, phosphorus or other elements added to improve the machinability of the steel.
• Recommended for maintenance work where better physical properties than those yielded by mild steel electrodes are required.
• Excellent at welding pipelines, circular tube to plate welds and other types of joints subject to stress and strain.

Features:

• Tensile strength: Up to 82,000 P.S.I. (565 MPa)
• Yield Strength: Up to 70,000 P.S.I. (480 Mpa)
• Elongation: 30 to 34%
• Current: AD or DC

Welding Procedures:

• Clean weld area of all foreign material.
• Preheating is not required except on some highly hardenable steels to prevent hard spots at the fusion zone.
• Hold a short arc, but do not whip, as this may cause porosity.
• Stringer beads are recommended, weave beads may be used but not more than 3 times the diameter of electrode, when using the larger sizes of electrode, a drag technique is suggested. Slag can be easily removed by chipping.

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